>>> on the broadcast tonight, deadlocked, with less than four days until the fiscal cliff deadline. the president summons congressional leaders to the white house. what will it take to get a deal and prevent your taxes from going up? >>> winter blast. we're tracking yet another big storm. tonight, the latest on where it is head and had how it will impact holiday travel. >>> caught in the middle. tonight, hundreds of children and families with shattered dreams. why has the russian government banned adoptions by u.s. citizens? >>> and new revelations about ronald reagan's relationships with two of the most powerful women in the world, the queen and margaret thatcher in documents released three decades later. "nightly news" begins now. >>> from nbc news world headquarters in new york, this is "nbc nightly news" with brian williams. >>> good evening, i'm natalie morales in tonight for brian. it is down to the wire now with about 80 hours until the fiscal cliff deadline. and on what is a holiday weekend for many, that is not the case for congressional leaders in washington. there was a s